Bath tub



FIG. 1 is a top plan view of a bath tub showing my new design;

FIG. 2 is a front elevational view thereof, the rear being a mirror image of the front shown;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a cross sectional view taken along line 5--5 of FIG. 1; and

FIG. 6 is a cross sectional view taken along line 6--6 of FIG. 1. 

The ornamental design for a bath tub, substantially as shown and described. 